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DHCP address reservations for Clients - multiple VLANs and subnets

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DHCP address reservations for Clients - multiple VLANs and subnets

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.

clangren

2022-04-16 20:42:54

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Registered: 2022-02-13

DHCP address reservations for Clients - multiple VLANs and subnets

2022-04-16 20:42:54

Model: ER605 (TL-R605)

Hardware Version: V1

Firmware Version: 1.2

Our environment is one ER605 connected to two SG2008s with an OC200 controller. We also use multiple VLANs - LAN/GUEST/SERVER/IOT/LOT with different IP address ranges.

We were having trouble setting Fixed IP Addresses in the config screen for clients. The application seemed to require an IP reservation in the same subnet to which the ER605 belonged, even though the client had (and properly needed) an IP address for a different VLAN/subnet.

The work-around to get a Fixed IP Address was to change the Network/VLAN in the config drop-down, followed by changing the Network back to the correct Network/VLAN, and then finally the application accepted a Fixed IP Address in the proper Network/VLAN without error.

2 Reply

Hank21

2022-04-18 06:24:21

Posts: 3673

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Registered: 2021-12-13

Re:DHCP address reservations for Clients - multiple VLANs and subnets

2022-04-18 06:24:21

To all,

Yes, it is designed to be like that, you need to choose the correct Network first:

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clangren

LV2

2022-04-21 03:42:13

Posts: 40

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Registered: 2022-02-13

Re:DHCP address reservations for Clients - multiple VLANs and subnets

2022-04-21 03:42:13

@Hank21

Thanks very much for the reply.

In my case the clients in question were joined to subnets other than LAN/default native. Therefore, when the Config menu is accessed the Network dropdown is not empty as in your screenshot. In my case the clients Config menu was pre-populated with IOT (or another appropriate Network). At that point it looked like I could key in an IP address appropriate to that Network/subnet and Apply. However, the masking/error checking on the IP address was apparently still set on the LAN subnet and therefore generated an error when keying an IP address for the Network which was displayed in the drop down.

The solution to allow the correct IP to be entered was select any other Network, reselect for the correct Network (which was originally displayed), and then the masking/error checking on the IP address is apparently updated to the proper subnet and the IP address in that subnet can be applied.

Thanks again for your reply.

DHCP address reservations for Clients - multiple VLANs and subnets

DHCP address reservations for Clients - multiple VLANs and subnets

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